qcom: softap: Fix potential string null termination and buffer overflow

Fix potential string null termination and buffer overflow

Change-Id: I05e28b30a4e3134625d20fb5591b239ea4b9f3a4
CRs-fixed: 554078
SAP: Make QSAP SDK compatible w.r.t Android framework.

SAP parameter ignore_broadcast_ssid always set to
"broadcast" due to improper handling of SAP parameters
at SAP SDK.

To mitigate this issue update the ignore_broadcast_ssid
parameter based on the value configured in the framework.

Change-Id: Ia1a35a38464710088921b94269b624d8b1910abc
CRs-Fixed: 588560